Problem Symptoms Table

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

PROBLEM SYMPTOMS

Symptom

Suspect Area

See Section

Engine immobiliser system is not set. (Engine starts with key codes except the registered key code)

Power source circuit
Transponder key ECU

Engine does not start.

Key
Wire harness
Transponder key amplifier circuit (w/ Coil)
Transponder key ECU

Security indicator is always ON.

Security indicator
Wire harness
Theft deterrent ECU ⁽³⁾
Transponder key ECU

Security indicator is always OFF. (Although code has been registered in the automatic registration mode, indicator is not OFF)

Wire harness
Theft deterrent ECU ⁽³⁾
Transponder key ECU

⁽¹⁾	Check whether or not the key which did not start the engine has been registered and that it is possible to start with other already registered keys.

⁽²⁾	Finish the automatic registration mode because the mode might still remain.

⁽³⁾	The security indicator gives blinking signals of the immobiliser when the Transponder Key ECU sends a command through BEAN to the Theft Deterrent ECU to activate the security indicator.